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Online Python Tutor
Copyright (C) 2010-2011 Philip J. Guo (philip@pgbovine.net)
https://github.com/pgbovine/OnlinePythonTutor/

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it under the terms of the GNU General Public License as published by
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<head>
  <title>Online Python Tutor</title>

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<script type="text/javascript" src="jquery.min.js"></script>

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<script type="text/javascript" src="edu-python.js"></script>
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<body>

<div id="pyInputPane">

Write your Python code here:
<br/>

<textarea class="codeInputPane" id="pyInput" cols="55" rows="20" wrap="off"></textarea>

<p>

<button id="executeBtn" class="bigBtn" type="button">Visualize execution</button>

</p>

<p style="margin-top: 25px;">Try these small examples:<br/>

<a id="aliasExampleLink" href="#">aliasing</a> |
<a id="tutorialExampleLink" href="#">intro</a> |
<a id="factExampleLink" href="#">factorial</a> |
<a id="fibonacciExampleLink" href="#">fibonacci</a> |
<a id="memoFibExampleLink" href="#">memoized fib</a> |
<a id="newtonExampleLink" href="#">square root</a> |
<a id="insSortExampleLink" href="#">insertion sort</a>
<br/>
<a id="filterExampleLink" href="#">filter</a> |
<a id="strtokExampleLink" href="#">tokenize</a> |
<a id="oopSmallExampleLink" href="#">OOP</a> |
<a id="pwGcdLink" href="#">gcd</a> |
<a id="pwSumListLink" href="#">sumList</a> |
<a id="towersOfHanoiLink" href="#">towers of hanoi</a> |
<a id="pwTryFinallyLink" href="#">exceptions</a>

</p>

<p style="margin-top: 25px;">Examples from the MIT 
<a href="http://mit.edu/6.01/">6.01</a> course:<br/>

<a id="mapExampleLink" href="#">list map</a> |
<a id="sumExampleLink" href="#">summation</a> |
<a id="oop1ExampleLink" href="#">OOP 1</a> |
<a id="oop2ExampleLink" href="#">OOP 2</a> |
<a id="inheritanceExampleLink" href="#">inheritance</a>

</p>

<p style="margin-top: 25px;">
Then try some programming questions:<br/>
Solve:
<a href="question.html?two-sum">Two-sum</a> |
<a href="question.html?reverse">Reverse list</a> |
<a href="question.html?remove-dups">Remove duplicate chars</a>

<br/>Debug:
<a href="question.html?debug-ireverse">In-place reverse</a> |
<a href="question.html?debug-bsearch">Binary search</a> |
<a href="question.html?debug-mergesort">Mergesort</a>

<br/>Optimize:

<a href="question.html?optimize-sum">Greatest sum</a> |
<a href="question.html?optimize-find-dups">Find duplicates</a> |
<a href="question.html?optimize-search">List search</a>

</p>




</div>


<table border="0" id="pyOutputPane">
<tr>
<td valign="top">

<center>

<div id="pyCodeOutputDiv">

Use <b>left</b> and <b>right</b> arrow keys to step through this code:
<table id="pyCodeOutput"></table>

</div>

<div id="editCodeLinkDiv">

<button id="editBtn" class="medBtn" type="button">Edit code</button>

</div>

<div id="vcrControls">
  <button id="jmpFirstInstr", type="button">&lt;&lt; First</button>
  <button id="jmpStepBack", type="button">&lt; Back</button>
  <span id="curInstr">Step ? of ?</span>
  <button id="jmpStepFwd", type="button">Forward &gt;</button>
  <button id="jmpLastInstr", type="button">Last &gt;&gt;</button>
</div>

<div id="errorOutput"></div>


</center>

Program output:
<br/>
<textarea id="pyStdout" cols="50" rows="13" wrap="off" readonly></textarea>


</td>
<td valign="top">

<div id="dataViz"></div>

</td>
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<input type="checkbox" id="classicModeCheckbox"/> Use low-bandwidth mode (for older browsers)


<p/>
This application supports the core <a
href="http://www.python.org/doc/2.5/">Python 2.5</a> language, with no
module imports or file I/O.  It's meant to be used as a platform for
creating programming tutorials, not for running or debugging
production code.

<p style="margin-top: 8px;"/>Official Python 3 support is coming soon;
for now, try the <a
href="http://netserv.ict.ru.ac.za/python3_viz/">Python 3 fork</a> by
Peter Wentworth.

<p style="margin-top: 8px;"/> 
Check out the <a
href="https://github.com/pgbovine/OnlinePythonTutor/">GitHub</a>
repository and send bug reports, feedback, and suggestions to philip@pgbovine.net

<p style="margin-top: 8px;"/>
Copyright &copy; 2010-2011 <a href="http://www.stanford.edu/~pgbovine/">Philip Guo</a>.  All rights reserved.
</div>

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